7,030,098 research outputs found

    Effect of reaction rate periodicity on detonation propagation

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    As an alternative to homogeneous reaction rates, we implement "synthetic" hot-spots through a depletion rate that is a function of the local pressure multiplied by a periodic function of the spatial coordinates. We investigate through numerical simulations how the detonation propagation is affected by the heterogeneous rate

    Steam gasification of bagasse: Effect of heating rate

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    Bagasse residue is a potential feedstock for steam gasification, but knowledge of this technology is still small and fragmented. Heating rate is of the most important factors influencing the gasification process. However, this parameter has not yet been fully investigated. In this study, the characteristics of bagasse and its chars were identified, and the effect of heating rate on steam gasification kinetics was studied. Bagasse contained little ash content, comparable to woody biomass, which is beneficial for thermochemical conversion processes. The bagasse char had a high heating value, comparable to coal. Effect of a small change in heating rate from 5 to 15 °Cmin-1 was not observed, while a significant increase from 15 to 1800 °Cmin-1 had a considerable effect on steam gasification kinetics. A char produced at a high heating rate increased gasification kinetics by 1.35 times compared to a char produced at a low heating rate. Results and data produced could be useful for the conception of new gasifiers using bagasse, such as staged-gasifiers in which the char production zone is separated from the gasification zone

    The Effect of Exchange Rate and Inflation on Foreign Direct Investment and Its Relationship with Economic Growth in Nigeria

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    This study is on the effect of exchange rate and inflation on foreign direct investment and its relationship with economic growth. Its main objective is to find the effect of inflation and exchange rate and the bidirectional influences between FDI and economic growth in Nigeria. A thirty year period was studied. A linear regression analysis was used on the thirty year data to determine the relationship between inflation, exchange rate, FDI inflows and economic growth. The study reveals that FDI follow economic growth occasioned by trade openness which saw the entry of some major companies especially the telecommunication companies, while Inflation has no effect on FDI. However exchange rate has effect on FDI

    Effect of dissipation on the decay-rate phase transition

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    A general condition for sharp transition of decay rate from quantum to thermal regimes is derived in dissipative tunneling models when position dependent mass is involved. It is shown that the effect of dissipation in general changes the order of the phase transition. Especially, for the models with constant mass the Ohmic dissipation enlarges the range of parameters for first-order phase transitions. In the case of second-order phase transition the Ohmic dissipation suppresses the decay rate near the transition temperature(T_c). For the super-Ohmic case the dissipation yields an opposite effects to the Ohmic dissipation within exponential approximation.Comment: 12 pages, 3figure

    PENGARUH RETURN ON INVESTMENT (ROI), OPERATING CASH FLOW(OCF), LEVERAGE DAN ECONOMIC VALUE ADDED (EVA) TERHADA PRATE OF RETURN PADA PERUSAHAAN FOOD AND BEVERAGES YANG TERDAFTAR DI BURSA EFEK INDONESIA

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    It represents empirical research, under the title “The Effect of Return on Investment (ROI), Operating Cash Flow (OCF), Leverage and Economic Value Added (EVA) on Rate of Return in Food and Beverage Companies listed at Indonesian Stock Exchanges. This research has purposed to know the effect of ROI, ECF, Leverage and EVA on Rate of Return; and to analyze the most significant effect of ROI, OCF, Leverage and EVA on Rate of Return. In this research, writer takes five hypotheses. They are: there is significant effect simultaneously among ROI, OCF, Leverage and EVA on Rate of Return; there is significant effect between ROI on Rate of Return; there is significant effect between OCF on Rate of Return; there is significant effect between leverage on Rate of Return; and there is significant effect between EVA on Rate of Return Data analysis technique uses Double Regression Analysis and processed by using computer program of SPSS for Windows Ver. 13.00 The research result concluded that based on the hypothesis tests, both simultaneously and partially, shows that ROI, OCF, Leverage and EVA are not affected significantly on Rate of Return. It is caused by the different samples and research periods and by the external factor, such as economic situation or condition in a state at the time research was held. Based on the conclusion above, the research can imply for the next researcher to consider another variables, which has strong effect on Rate of Return, and also consider them in sampling and research period to get different conclusion in this researc
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